Chemical condensation products, their preparation and use

Abstract

Condensation products are formed from the unsaponifiable constituents of tall oil and alpha- beta- unsaturated mono- or poly-basic aliphatic acids or their derivatives. The condensation products can be formed into aqueous soap solutions in which form they find use as agents in the sizing of paper, particularly when used as fortifying agents for rosin acid soap sizes.

I claim: 
     
       1. A condensation for use in the sizing of paper which consists essentially of unsaponifiable constituents of tall oil having a boiling range of 60° - 160° C at 1 mm Hg, an iodine value of 250 - 350 and an acid value of substantially zero condensed at temperatures between 140° and 260° C with one or more alpha, beta - unsaturated acids and anhydrides thereof selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, fumaric acid, maleic acid, maleic anhydride, itaconic acid, citric acid, and dehydrated citric acid. 
     
     
       2. A condensation product according to claim 1, wherein 100 parts by weight of unsaponifiable constituents of tall oil have been condensed with a total of from 5 - 50 parts by weight of the said acids or derivatives thereof. 
     
     
       3. A condensation product according to claim 1, which consists essentially of 100 parts of unsaponifiable constituents of tall oil having a boiling range of 60° - 160° C at 1 mm Hg, an iodine value of 250 - 350 and an acid value substantially zero condensed with from 5 to 50 parts by weight of maleic anhydride. 
     
     
       4. A condensatin product according to claim 1 subsequently modified to contain amide groups with a reagent selected from the group consisting of ammonia, urea, alkylamines and alkanolamines. 
     
     
       5. A condensation product according to claim 1 in the form of an aqueous soap solution. 
     
     
       6. Soap solutions as claimed in claim 5 which also contain a rosin acid soap.